Need advice on how to perform plastic deformation of a metal through a die in extrusion

I am trying to perform metal extrusion of a billet through a die. Although I have tried playing around with contact sets, and advanced convergence parameters in the simulation module, the problem always fails and I am unable to generate any valid results for the extruded metal. FYI, I have already tried 2D axisymmetric and 3D modeling, but I am clearly missing something elementary. Please help me with your advice. I am uploading the part and the result files with this question.

This is not a type of simulation that can be done with SWX Sim or flow.The element distortions would be too large. You would in solution remeshing or an Euler code, assuming the die does reduce the cross section in the order of a percentage or more. This is a pretty sophisticated simulation.